to me,. According to the placard on the Pocket door, it must be OPEN for Taxi, takeO=F and landing, latches locking in Open position.= G550 sim at Simuflite Morristown NI Also, there is a simulator in Morristown NJ that operates a 6550 simulator, i= you have time Let me know, i can see what is a=ailable? Thx, Larry